POWER STEERING SYSTEM, Diagnostic DTC:C1531, C1532, C1533, C1534, C1535

DTC Code DTC Name
C1531 ECU Malfunction
C1532 ECU Malfunction
C1533 ECU Malfunction
C1534 ECU Malfunction
C1535 ECU Malfunction

DESCRIPTION

The fail-safe function operates to stop power assist when DTCs indicating ECU malfunctions are stored. However, the power assist operation continues when DTC C1533 or C1534 is stored because it indicates an EEPROM error in the ECU.

DTC No. DTC Detection Condition Trouble Area
C1531 ECU internal malfunction (CPU malfunction) Power steering ECU assembly
C1532 ECU internal malfunction (Peripheral circuit malfunction)
C1533 ECU internal malfunction (Substrate temperature sensor malfunction)
C1534 ECU internal malfunction (EEPROM error)
C1535 ECU internal malfunction (Steering wheel location data error)

CAUTION / NOTICE / HINT

Note

If the power steering ECU assembly has been replaced with a new one, perform assist map writing and torque sensor zero point calibration Click here.

PROCEDURE


  1. CHECK FOR DTC


    1. Check for DTCs Click here.

      Result
      Result Proceed to
      DTCs other than C1531, C1532, C1533, C1534 and C1535 are output A
      Other DTC are not output (for LHD) B
      Other DTC are not output (for RHD) C

    A

    REPAIR CIRCUITS INDICATED BY OUTPUT DTCS Click here

    B

    REPLACE POWER STEERING ECU ASSEMBLY Click here

    C

    REPLACE POWER STEERING ECU ASSEMBLY Click here